I recently gave my Agile Testing Overview presentation at a client site.
As I was preparing to do the talk, I dusted off my old slides and realized that they were in desperate need of an update. In some cases, my thinking has shifted a little in the years since I first drafted the slides. But more importantly, the slides focused far too much on drawing a distinction between traditional and Agile methods, and not enough on the concrete Agile Testing principles and practices.
The new slides (pdf, 1Mb) identify 9 principles and 6 concrete Agile testing practices. Enjoy.